Retract the 14 by 9 inch footrest and this is a mesh task chair; pull it out, tip the sectional back to 135 degrees, and it becomes a place to nap between shifts. The back locks anywhere across a 90 to 135 degree range. Lumbar support slides 2 inches vertically to find the right vertebra, and the 2D headrest moves 2.2 inches while pivoting 45 degrees. Breathable mesh handles heat over long sittings, and the 3.5 inch seat, footrest and linked armrests are padded with 25D sponge that resists deformation. Seat measurements are 20 inches wide by 18.5 inches deep, adjusting from 16.5 to 20 inches high, with armrests at 25 to 28.5 inches. Load rating is 350 lbs; the chair spans 27.5 inches square and weighs 29.5 lbs. The headrest adjusts in angle and height, while the lumbar section can be raised independently. Seat height: 16.5"-20"